Stress Corrosion Behavior of Ungrouted Pretensioned Concrete Beams

Table 4

AC impedance parameters for the rebar and prestressed steel in chloride-contaminated concrete.

System	AC impedance parameters
	Rebar				Prestressed steel wire
	Rct (Ω·cm^2) × 10^4	Cdl (F·cm^−2) × 10^−5	Icorr (mA·cm^2) × 10^−3	CR (mmpy) × 10^−2	Rct (Ω·cm^2) × 10^4	Cdl (F·cm^−2) × 10^−5	Icorr (mA·cm^2) × 10^−3	CR (mmpy) × 10^−2
Control	4.897	1.733	0.533	0.617	4.355	1.623	0.599	0.694
1% NaCl	4.010	2.225	0.651	0.754	3.766	2.088	0.692	0.803
2% NaCl	2.357	2.417	1.107	1.283	2.286	3.174	1.141	1.323
3% NaCl	2.131	2.618	1.224	1.419	1.441	5.125	1.810	2.098